Need to pass this on to others...
We have a 2015 LG SS. Took a trip last summer for 2 1/2 weeks. The first day out we had the refrigerator loaded to the gills and stopped for the night - it was HOT outside, and we were traveling north, so the rear kitchen compartment was exposed to the sun. Spent the night at a campground in mid Virginia along I-81, then headed north the next morning to Wilkes-Barre, PA. Got into our daughter's and husband's place and parked the camper, and went to get the content out of the cooler for my wife (who has a medical condition, and we pack her dietary requirements with us). I opened the clamshell to the galley area, and went to remove our perishables (no shore power at their house), and the temp on the fridge was at 77 degrees F. Packing up the next day, we loaded the perishables in another cooler with ice, just to make sure they didn't spoil. But, we left the fridge connected in the galley, just to test.
Arrived at our next destination for a couple of days before heading to Maine. Unfortunately, this was over the Labor Day weekend, and all repair shops were closed for the long weekend. My sister-in-laws boyfriend is a well trained and 'jack of all trades' engineer, and he helped me run some tests on the Norcold/Dometic refrigerator, and we discovered that we were getting good power (hooked up to 12V battery in car and to the connection in the galley), when connected via 7 way trailer connection we were getting power and charging the deep cycle battery on the camper, no obstructions to the cooling fan, etc. However, it appeared that there was some corrosion around the coolant tank and on some of the bolt down hardware. So, he went through and checked the switches - the on/off power switch is sealed, and was working, but when he toggled the low voltage switch (there are 3 positions on the switch to select the low power cut off voltage, this is located to the right of the on/off power switch), the error codes on the temperature display disappeared, and the fridge started cooling again, and maintained the set temperature.
I went ahead and opened up the plastic panel that allows access to the switches this past weekend, loosened the switch so I could access it better, and took some electrical component cleaner (aerosol can) and a towel, and slowly toggled the switch a number of times, then sprayed a couple of brief squirts of the cleaner into the ends of the switch, again toggled the switch between the 3 modes slowly a number of times, let it set for a couple of minutes to allow the cleaner to evaporate, then blew the switch out with compressed air. I repeated this 4 times.
Reattached the switch to the plastic panel, and reassembled the panel and plugged the cooler back in to the 110V adapter to check - fridge cooled down quickly (recommended setting is in switch position 3). Made sure it was working, then replaced the fridge in the camper kitchen, and made sure that it was cooling - working fine.
Wanted to let others know about this in the event that they, too, have issues with error codes and the Norcold/Dometic fridge not cooling as it should!